Chicken seminal plasma contains a high content of sex steroids including progesterone (P4). According to a published study, in vitro supplementation of P4 to the semen resulted in decreased fertility in the White Leghorn chicken; however, it is not known if increased P4 production in vivo is associated with decreased sperm fertility. Therefore, the aim of the present experiment was to study the...

Furazolidone was given to male Nubian goats for 5 days at a therapeutic dose of 10 mg/kg or at a dose of 40 mg/kg, and the effect on semen morphology and biochemistry was studied. At the lower dose, furazolidone significantly reduced seminal ejaculate volume, the number of motile spermatozoa per ejaculate and the number of live spermatozoa per ejaculate, while secondary abnormalities increased....

This study was conducted to evaluate rabbit semen characterization before freezing and after thawing. Also, to determine the sex ratio of rabbit offspring’s after artificial insemination (AI) using semen selected by Percoll or swim up method. Semen was collected from New Zealand white rabbit bucks (n=9) and 45 rabbit does in three groups (15 in each) were inseminated with frozen semen (control,...

A.I. studs and selection programs are interested in the broad distribution of sires of high genetic merit. This is at least partly conditioned by the semen characteristics (sperm quality and volume of the ejaculates) of the bulls. However, when most bulls have a satisfactory production or when management can be optimized to ensure maximum output, selection on semen characteristics can be consid...

A total of 30 ejaculates from three Hampshire crossbred boars were used to study the effect of freezing rates and thawing methods on quality of frozen boar semen. Semen was frozen using three freezing rates-30 0 c/min, 50 0 c/min and 70 0 c/min in a programmable biological semen freezer. The semen characteristics viz., sperm motility, live sperm, HOST reacted spermatozoa and intact acrosome wer...

Elevating the level of specific omega-3 fatty acids in equine semen by dietary modification can improve motion characteristics of cooled-stored and frozen-thawed sperm. Stallions, which produce semen that has poor tolerance to cooling and freezing, would benefit most from this dietary modification.

This study aimed at determining the physico-morphological attributes, in vitrofertilityand their interrelationships in semen of Sahiwal bulls. Semen samples werecollected weekly for 6 weeks from ten mature Sahiwal bulls divided randomly into 5 groups. The mean (±SEM) of ejaculate volume (mL), mass activity (score 0-5), progressive sperm motility (%), sperm concentration (106/mL), live sperm (%)...

The effects of different extenders and storage periods on the motility and fertilization rate of rainbow trout (Oncorhynchus mykiss) semen were evaluated after short-term storage. Semen was collected from anesthetized males by the abdominal massage. After determination of main semen characteristics, the pooled ejaculates were diluted with 4 different extenders at a ratio of 1:3, and stored at 4...

Semen was collected from six dromedary camels using artificial vagina during rutting season. Liquefaction of the viscous semen occurred in 23.89 ± 1.49 h. During liquefaction, proteins with molecular masses of 24.55 kDa and 22.07 kDa appeared in conjunction with the disappearance of intact 26.00 kDa protein after 18-24 h. These proteins were identified as β-nerve growth factors (β-NGFs) in liqu...